Straight-edge.



' L. R. HERMAN.

STRAIGHT EDGE.

APPLICATION rum) JUNE 28, 1909.

Patented Mar. 1, 1910.

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\ STATES PA N OFFWE LUIIU R. HERMAN, 0F CLEVELAND, OHIO.

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- To all whom it may concern! Be it known that l[, LULU R. HERMAN, a citizen of the United States, and resident of Cleveland, in the county of Cuyahoga and State of Ohio, have.invented certain new and useful Improvements in Straight- Edges, of which ll hereby declare the followlines upon a wall or other plane surface, as

upon a black board for demonstration purposes. The straight edge is further designed to be attachable temporarily to the said wall surface so that it will remain in position without handling while a straight line is being drawn and is also adapted to be read --ily detached therefrom, and to be adjusted so that a succession of parallel lines can be drawn at any desired distance apart with perfect accuracy.

The invention comprises, the ruler or straight edge, provided with compressible suction cups, by means of which the device will adhere to the wall surface by atmospheric pressure.

Other features are gage strips provided with spaced openings and detents or-locking devices arranged to engage with the openings, so as to give accuracy to the work of positioning the parallel lines.

The invention is illustrated in the accompanying drawings, hereinafter more fully described, and specifically pointed out in the claims.

In. the accompanying drawings, F 'gure 1 is a perspective view of a black board having a smooth surface to which the straight edge is attached; Fig. 2 is an edge view of the straight edge; Fig. 3 is a plan view thereof; Fig. 4. is a transverse section of the straight edge, showing a portion of one of the gages broken away to illustrate the sprin detent. Fig. 5 is a plan view (enlarge d) of one end of the straight edge, showing the gage and its adjustment; and Fig. 6 is a transverse section through one of the suction cups.

In these views 1 is the straight ed e having a flat body portion preferably eveled Specification of Letters Patent. Application filed June 20, 1909. Serial No. 504,650.

Patented Mar.

and graduated at one side at 2 for convenience in taking measurements.

3, 3 are compressible suction cups formed of rubber;, by means of which the straight edge issecured to a blackboard. This is accomplished by placing them in openings 4, 4 in which the edges are inclosed when the cups are compressed; 5, 5 are knobs by meansof which the straightedge can be readily handled, and for convenience they are attached to the same supports 6, 6 to which the suction cups are secured. Each cup is compressed by pressure upon its corresponding knob, and a slight pull upon the knob is sufficient to detach the same.

The gages7, 7 are shown to comprise transversely placed strips or members slidingly movable in guides 8, 8. Their tips 9, 9 are preferably bent over so as to touchthe wall or board, and each strip is provided with spaced recesses or perforations 10, 10 into which the spring actuated detents 11,11 will fall. The spring detents or detent memhers are readily raised at their tips 12, 12 for without departing from the scope of the claims.

The device is believed to provide improved capabilities and improvements in practicability and efficiency in the art.

Having described the invention what I claim as new and desire to secure by Letters Patent is 1. In a straight edge in combination with a flat body portion,,said body portion provided with spaced 0 enings, supports crossing said openings, a iandle on each support,

and a suction cup in'each opening secured to one of sa1d supports.

2. In a straight edge, in combination with the flat body portion, compressible suction cups attached thereto, a support for each cup on said body portion, said body portlon provided with openings in which said cups are adapted to be compressed.

In testimony whereof, I hereunto set my hand this 25 day of June 1909.

LlUlUU R. HERMAN. 

